:root {
  --ink: #072532;
  --ink2: #0d4050;
  --gold: #d4a64e;
  --paper: #f7f2e8;
  --muted: #5b7179;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(
      circle at 10% 10%,
      rgba(212, 166, 78, 0.14),
      transparent 25%
    ),
    var(--paper);
  font-family: "Heebo", Arial, sans-serif;
}
.challenge-shell {
  width: min(100% - 28px, 1080px);
  margin-inline: auto;
}
.challenge-hero {
  padding: 135px 0 70px;
}
.challenge-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
  gap: 55px;
  align-items: center;
}
.challenge-copy > span,
.day-kicker {
  color: #9a6e26;
  font-weight: 900;
}
.challenge-copy h1 {
  margin: 10px 0 18px;
  font-family: "Rubik", sans-serif;
  font-size: clamp(3rem, 6vw, 5.8rem);
  line-height: 0.98;
}
.challenge-copy > p {
  color: var(--muted);
  font-size: 1.15rem;
  line-height: 1.85;
}
.challenge-cover {
  margin: 0;
  overflow: hidden;
  border-radius: 28px;
  box-shadow: 0 28px 70px rgba(5, 32, 42, 0.2);
}
.challenge-cover img {
  display: block;
  width: 100%;
  height: auto;
}
.challenge-rules {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 26px 0;
}
.challenge-rules div {
  padding: 17px;
  border: 1px solid rgba(7, 37, 50, 0.1);
  border-radius: 17px;
  background: #fff;
}
.challenge-rules strong,
.challenge-rules small {
  display: block;
}
.challenge-rules strong {
  font-size: 1rem;
}
.challenge-rules small {
  margin-top: 3px;
  color: var(--muted);
}
.signup-card {
  padding: 32px;
  border-radius: 27px;
  color: #fff;
  background: linear-gradient(135deg, #0d4050, #061c26);
  box-shadow: 0 24px 55px rgba(4, 25, 34, 0.22);
}
.signup-card h2 {
  margin: 0 0 7px;
  font-family: "Rubik", sans-serif;
  font-size: 2.1rem;
}
.signup-card > p {
  margin: 0 0 20px;
  color: rgba(255, 255, 255, 0.72);
}
.signup-form {
  display: grid;
  gap: 13px;
}
.signup-form label {
  display: grid;
  gap: 6px;
  font-weight: 800;
}
.signup-form input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 12px;
  color: var(--ink);
  background: #fff;
  font: inherit;
}
.challenge-button {
  min-height: 50px;
  padding: 12px 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 999px;
  color: #071f29;
  background: #edcf83;
  font:
    900 1rem "Heebo",
    sans-serif;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.17);
}
.challenge-button:hover {
  background: #fff0bd;
}
.signup-status {
  min-height: 24px;
  margin: 0;
  color: #ffe7a9;
  font-weight: 800;
}
.signup-note {
  color: rgba(255, 255, 255, 0.61);
  font-size: 0.76rem;
}
.challenge-preview {
  padding: 75px 0;
  background: #fff;
}
.challenge-preview-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.55fr) minmax(0, 1fr);
  gap: 45px;
  align-items: center;
}
.challenge-video {
  width: min(100%, 440px);
  margin-inline: auto;
  overflow: hidden;
  border: 1px solid rgba(7, 37, 50, 0.15);
  border-radius: 26px;
  background: #000;
  box-shadow: 0 22px 55px rgba(5, 32, 42, 0.18);
}
.challenge-video iframe,
.challenge-video .lite-youtube {
  display: block;
  width: 100%;
  aspect-ratio: 9/16;
  border: 0;
  border-radius: inherit;
}
.challenge-preview h2 {
  font-family: "Rubik", sans-serif;
  font-size: clamp(2.3rem, 4vw, 4rem);
  line-height: 1.06;
}
.challenge-preview p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.85;
}
.challenge-day {
  padding: 125px 0 75px;
}
.day-head {
  text-align: center;
}
.day-head h1 {
  margin: 7px 0 10px;
  font-family: "Rubik", sans-serif;
  font-size: clamp(2.45rem, 6vw, 4.6rem);
  line-height: 1.04;
}
.day-head p {
  margin: 0 auto 30px;
  color: var(--muted);
  font-size: 1.05rem;
}
.day-progress {
  max-width: 620px;
  margin: 0 auto 32px;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 6px;
}
.day-progress span {
  height: 7px;
  border-radius: 999px;
  background: #d9d1c3;
}
.day-progress span.done {
  background: var(--gold);
}
.challenge-content {
  width: min(100%, 620px);
  margin-inline: auto;
}
.calendar-box {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  margin: 0 0 34px;
  padding: 26px;
  border: 1px solid rgba(212, 166, 78, 0.45);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 16px 38px rgba(5, 32, 42, 0.1);
}
.calendar-icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: #f7e8bd;
  font-size: 1.75rem;
}
.calendar-copy h2 {
  margin: 0 0 7px;
  font:
    900 1.65rem "Rubik",
    sans-serif;
}
.calendar-copy > p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}
.calendar-actions {
  display: flex;
  gap: 12px;
  align-items: end;
  margin-top: 18px;
}
.calendar-actions label {
  display: grid;
  gap: 5px;
  color: var(--ink2);
  font-weight: 800;
}
.calendar-actions input {
  min-height: 50px;
  padding: 10px 13px;
  border: 1px solid rgba(7, 37, 50, 0.2);
  border-radius: 13px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}
.calendar-download {
  min-height: 50px;
  padding: 10px 16px;
  border: 1px solid rgba(7, 37, 50, 0.22);
  border-radius: 999px;
  color: var(--ink2);
  background: #fff;
  font:
    800 0.93rem "Heebo",
    sans-serif;
  cursor: pointer;
}
.calendar-download:hover {
  border-color: var(--gold);
  background: #fff9e9;
}
.calendar-status {
  min-height: 22px;
  margin: 10px 0 0 !important;
  color: #287044 !important;
  font-weight: 800;
}
.calendar-status.is-error {
  color: #a72d2d !important;
}
.challenge-image {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto 32px;
  border-radius: 24px;
  box-shadow: 0 22px 55px rgba(5, 32, 42, 0.16);
}
.day-video-label {
  margin: 0 0 15px;
  text-align: center;
  font:
    900 1.55rem "Rubik",
    sans-serif;
}
.day-instruction {
  margin: 34px 0;
  padding: 24px;
  border: 1px solid rgba(7, 37, 50, 0.1);
  border-radius: 20px;
  color: #405a63;
  background: #fff;
  font-size: 1rem;
  line-height: 1.8;
}
.worksheet-box {
  margin: 35px 0;
  padding: 28px;
  border-radius: 24px;
  color: #fff;
  background: linear-gradient(135deg, #0d4050, #061c26);
  text-align: center;
}
.worksheet-box h2 {
  margin: 0 0 8px;
  font-family: "Rubik", sans-serif;
  font-size: 2rem;
}
.worksheet-box p {
  margin: 0 0 19px;
  color: rgba(255, 255, 255, 0.7);
}
.challenge-day-nav {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  width: min(100%, 620px);
  margin: 14px auto 28px;
}
.challenge-day-nav a {
  display: grid;
  place-items: center;
  min-height: 44px;
  padding: 7px 4px;
  border: 1px solid rgba(212, 166, 78, 0.5);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink2);
  font-weight: 900;
  text-decoration: none;
}
.challenge-day-nav a:hover,
.challenge-day-nav a:focus-visible {
  border-color: var(--gold);
  background: #fff9e9;
}
.challenge-day-nav a.is-current {
  border-color: var(--gold);
  background: var(--ink2);
  color: #fff;
  box-shadow: 0 8px 20px rgba(5, 32, 42, 0.18);
}
.worksheet-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}
.worksheet-preview {
  margin-top: 22px;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.28);
  border-radius: 18px;
  background: #fff;
}
.worksheet-preview iframe {
  display: block;
  width: 100%;
  height: 720px;
  border: 0;
}
.day-next {
  display: flex;
  justify-content: center;
  margin-top: 35px;
}
.challenge-finish {
  padding: 28px;
  border: 1px solid rgba(212, 166, 78, 0.4);
  border-radius: 24px;
  background: #fff;
  text-align: center;
}
.challenge-finish h2 {
  font-family: "Rubik", sans-serif;
  font-size: 2rem;
}
.challenge-finish p {
  color: var(--muted);
  line-height: 1.75;
}
.challenge-footer {
  padding: 30px;
  text-align: center;
  color: #abc0c7;
  background: #061b25;
}
.challenge-footer a {
  color: #efd48e;
}
@media (max-width: 820px) {
  .challenge-hero {
    padding: 100px 0 55px;
  }
  .challenge-hero-grid,
  .challenge-preview-grid {
    grid-template-columns: 1fr;
  }
  .challenge-cover {
    width: min(100%, 480px);
    margin-inline: auto;
  }
  .challenge-rules {
    grid-template-columns: 1fr;
  }
  .challenge-copy h1 {
    font-size: clamp(2.7rem, 13vw, 4rem);
  }
  .challenge-day {
    padding-top: 100px;
  }
}
@media (max-width: 560px) {
  .worksheet-preview iframe {
    height: 520px;
  }
  .calendar-box {
    grid-template-columns: 1fr;
    padding: 22px 17px;
  }
  .calendar-icon {
    margin-inline: auto;
  }
  .calendar-copy {
    text-align: center;
  }
  .calendar-actions {
    display: grid;
  }
  .calendar-actions label {
    text-align: right;
  }
  .calendar-actions input,
  .calendar-actions .challenge-button,
  .calendar-actions .calendar-download {
    width: 100%;
  }
  .challenge-shell {
    width: min(100% - 20px, 1080px);
  }
  .signup-card {
    padding: 24px 18px;
  }
  .challenge-image {
    border-radius: 18px;
  }
  .worksheet-box {
    padding: 24px 17px;
  }
  .challenge-day {
    padding-bottom: 90px;
  }
}